LEARN NC

K–12 teaching and learning · from the UNC School of Education

Geometry

Goal 2: Geometry and Measurement - The learner will use geometric and algebraic properties of figures to solve problems and write proofs.

Objective 2.02. Apply properties, definitions, and theorems of angles and lines to solve problems and write proofs.

Additional related resources

We’re in the process of aligning our content for students to the Standard Course of Study. As we do, you’ll find it here.

General resources

Aligned lesson plans

Proof puzzles
Students will work in small groups to put geometric proofs that have been cut apart in the correct order. They will organize statements with the correct reason. A recorder in the group will write the finished product for the group to turn in to the teacher.
Format: lesson plan (grade 9–12 Mathematics)
By ann mewborn.

Resources on the web

Symmetries III
This lesson, from Illuminations, helps students to understand how translations work and what happens when two or more translations are applied one after the other. (Learn more)
Format: lesson plan (grade 9–12 Mathematics)
Provided by: National Council of Teachers of Mathematics
Symmetries II: Conclusions
In this lesson, one of a multi-part unit from Illuminations, students reflect on what they learned in the three previous lessons. (Learn more)
Format: lesson plan (grade 9–12 Mathematics)
Provided by: National Council of Teachers of Mathematics
Relationships between reflections and symmetry
In this lesson, one of a multi-part unit from Illuminations, students learn the properties of designs that have bilateral symmetry. They also make their own designs and investigate dihedral symmetry. (Learn more)
Format: lesson plan (grade 9–12 Mathematics)
Provided by: National Council of Teachers of Mathematics